<template>
  <div>
    <!-- 评论列表 -->
    <van-list
  v-model="loading"
  :finished="finished"
  finished-text="没有更多了"
  @load="onLoad"
  :immediate-check='false'
>
   <div v-for="(comment) in commentVal" :key="comment.com_id"  class="cmt-list" :class="{'art-cmt-container-1':isShowCmtInput,'art-cmt-container-2':!isShowCmtInput}">
      <!-- 评论的 Item 项 -->
      <div class="cmt-item">
        <!-- 头部区域 -->
        <div class="cmt-header">
          <!-- 头部左侧 -->
          <div class="cmt-header-left">
            <img :src="comment.aut_photo" alt="" class="avatar">
            <span class="uname">{{comment.aut_name}}</span>
          </div>
          <!-- 头部右侧 -->
          <div class="cmt-header-right">
            <van-icon name="like" @click="isLike(true)" v-if="commentVal.is_liking" size="16" color="red" />
            <van-icon name="like-o" @click="isLike(false)" v-else size="16" color="gray" />
          </div>
        </div>
        <!-- 主体区域 -->
        <div class="cmt-body">
          {{comment.content}}
        </div>
        <!-- 尾部区域 -->
        <div class="cmt-footer">{{time (comment.pubdate)}}</div>
      </div>
    </div>
</van-list>

    <div v-if="isShowCmtInput" class="add-cmt-box van-hairline--top">
    <van-icon name="arrow-left" size="0.48rem" @click="$router.back()" />
    <div @click="isShowCmtInput=false"  class="ipt-cmt-div">发表评论</div>
    <div class="icon-box">
        <van-badge :content='commentsNum.total_count'>
            <van-icon name="comment-o" size="0.53333334rem" />
        </van-badge>
        <van-icon name="star-o" size="0.53333334rem" />
        <van-icon name="share-o" size="0.53333334rem" />
    </div>
</div>

<!-- 底部添加评论区域 - 2 -->
<div v-else  class="cmt-box van-hairline--top">
    <textarea @blur="blurFn" v-model="authorComment" v-fofo placeholder="友善评论、理性发言、阳光心灵"></textarea>
    <van-button type="default" @click.native="inputComment" :disabled='authorComment===""'>发布</van-button>
</div>
  </div>
</template>

<script>
import { timeAgo } from '@/utils/date'
import { commentSend, getComments } from '@/api'
export default {
  props: ['commentVal', 'commentsNum'],
  methods: {
    time (val) {
      return timeAgo(val)
    },
    isLike (res) {
      this.$emit('changeLike', res, this.commentVal.com_id)
    },
    async inputComment () {
      const result = await commentSend(this.$route.query.id, this.authorComment, null)
      if (result.status < 300 && result.status >= 200) {
        this.$emit('refreshComments')
      }
    },
    blurFn () {
      setTimeout(() => { this.isShowCmtInput = true }, 300)
    },
    async  onLoad () {
      // 异步更新数据
      // setTimeout 仅做示例，真实场景中一般为 ajax 请求
      await getComments(this.$route.query.id, this.last_id)

      // 加载状态结束
      this.loading = false
    }
  },
  data () {
    return {
      isShowCmtInput: true,
      authorComment: '',
      loading: false,
      finished: false,
      last_id: this.commentsNum.last_id || null
    }
  }
}

</script>

<style scoped lang="less">
.cmt-list {
  padding: 10px;
  .cmt-item {
    padding: 15px 0;
    + .cmt-item {
      border-top: 1px solid #f8f8f8;
    }
    .cmt-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      .cmt-header-left {
        display: flex;
        align-items: center;
        .avatar {
          width: 40px;
          height: 40px;
          background-color: #f8f8f8;
          border-radius: 50%;
          margin-right: 15px;
        }
        .uname {
          font-size: 12px;
        }
      }
    }
    .cmt-body {
      font-size: 14px;
      line-height: 28px;
      text-indent: 2em;
      margin-top: 6px;
      word-break: break-all;
    }
    .cmt-footer {
      font-size: 12px;
      color: gray;
      margin-top: 10px;
    }
  }
}
/*美化 - 文章详情 - 底部的评论页面 */
// 外层容器
.art-cmt-container-1 {
  padding-bottom: 46px;
}
.art-cmt-container-2 {
  padding-bottom: 80px;
}

// 发布评论的盒子 - 1
.add-cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  box-sizing: border-box;
  background-color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 46px;
  line-height: 46px;
  padding-left: 10px;
  .ipt-cmt-div {
    flex: 1;
    border: 1px solid #efefef;
    border-radius: 15px;
    height: 30px;
    font-size: 12px;
    line-height: 30px;
    padding-left: 15px;
    margin-left: 10px;
    background-color: #f8f8f8;
  }
  .icon-box {
    width: 40%;
    display: flex;
    justify-content: space-evenly;
    line-height: 0;
  }
}

.child {
  width: 20px;
  height: 20px;
  background: #f2f3f5;
}

// 发布评论的盒子 - 2
.cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  padding-left: 10px;
  box-sizing: border-box;
  background-color: white;
  textarea {
    flex: 1;
    height: 66%;
    border: 1px solid #efefef;
    background-color: #f8f8f8;
    resize: none;
    border-radius: 6px;
    padding: 5px;
  }
  .van-button {
    height: 100%;
    border: none;
  }
}
</style>
